... . HDPE Sand Delivery Pipe has good flexibility, tensile strength and elastic, pipe extrusion, pack, it doesn't break after internal and ... , Piping material of corrosion resistance is strong, can soak in sea water for 50 years with no change, Anti-uv, anti-aging ... upon sand content.4. HDPE Sand Delivery Pipe is assembled with two metal activity flanges at both pipe ends. The entire pipe is ...